statistic1

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Pergunta 1
1 em 1 pontos
	
	
	
	Skills: Identify subjects and variablesCategorical vs. quantitative.
"multiple choice" question: select the correct answer. Remember that a categorical variable is one that can be categorized, or put into types.
A quantitative variable is one that can be measured. Of the following variables, which ones are categorical? 
	
	
	
	
		Resposta Selecionada:
	 
Gender, Types of Bears, Locations, Sunburn Types
	Resposta Correta:
	 
Gender, Types of Bears, Locations, Sunburn Types
	Feedback da resposta:
	Correct! All of these can be placed in categories. Great job!
	
	
	
Pergunta 2
0 em 1 pontos
	
	
	
	Skills: Compare distributions
Identify subjects and variablesInterpret boxplots
"multiple choice" question: select the correct answer. Who has the higher scores on SSHA, in general?
	
	
	
	
		Resposta Selecionada:
	 
Males
	Resposta Correta:
	 
Females
	
	
	
Pergunta 3
1 em 1 pontos
	
	
	
	Skills: Generate graphical displays of the distribution of a quantitative variable and use them to summarize the overall pattern of the distribution.
Identify subjects and variables"multiple choice" question: select the correct answer. 
The side-by-side boxplots below display the delivery time distributions (in minutes) of two pizza shops – “Big Slice” and “City Pizza”
75% of Big Slice deliveries take: 
	
	
	
	
		Resposta Selecionada:
	 
More than 25 minutes
	Resposta Correta:
	 
More than 25 minutes
	Feedback da resposta:
	This is correct.
	
	
	
Pergunta 4
1 em 1 pontos
	
	
	
	Skills: Generate graphical displays of the distribution of a quantitative variable and use them to summarize the overall pattern of the distribution.Identify subjects and variables
"multiple choice" question: select the correct answer. Here again, is the side-by-side boxplots that display the delivery time distributions (in minutes) of two pizza shops – “Big Slice” and “City Pizza” 
Within which delivery time interval would you expect to find the largest number of City Pizza deliveries?
	
	
	
	
		Resposta Selecionada:
	 
Between 25 and 30 minutes
	Resposta Correta:
	 
Between 25 and 30 minutes
	Feedback da resposta:
	This is correct.
	
	
	
Pergunta 5
0 em 1 pontos
	
	
	
	Skills: Identify subjects and variablesGenerate numerical measures of center of spread of the distribution of a quantitative variable and use them to summarize the distribution.
"multiple choice" question: select the correct answer. Here again, is the distribution of number hours of exercise per week for 50 male college student:
What do you expect the relationship between the mean and the median of this distribution to be?
	
	
	
	
		Resposta Selecionada:
	 
The mean will be smaller than the median
	Resposta Correta:
	 
The mean will be larger than the median
	
	
	
Pergunta 6
0 em 1 pontos
	
	
	
	Skills: Identify subjects and variablesGenerate numerical measures of center of spread of the distribution of a quantitative variable and use them to summarize the distribution.
"multiple choice" question: select the correct answer.
Based on the collected data, approximately what percent of self-employed individuals work between 47 and 63 hours per week?
	
	
	
	
		Resposta Selecionada:
	 
34%
	Resposta Correta:
	 
47.5%
	
	
	
Pergunta 7
0 em 1 pontos
	
	
	
	Skills: Compare distributions
Identify subjects and variables
Interpret boxplots "multiple choice" question: select the correct answer. 
What is the approximate median SSHA score for each gender? 
	
	
	
	
		Resposta Selecionada:
	 
Females = 145, Males = 100 
	Resposta Correta:
	 
Females = 153, Males =114 
	
	
	
Pergunta 8
0 em 1 pontos
	
	
	
	Skills: Summarize the distribution of a categorical variable.Identify subjects and variables
"multiple choice" question: select the correct answer. Consider the following graph that shows the how recycling has changed in the U.S. from 1990 to 2015:
Which of the following is true regarding this graph?
	
	
	
	
		Resposta Selecionada:
	 
This graph is misleading because of the choice of colors.
	Resposta Correta:
	 
This graph is misleading because it violates the principle that the area representing each year is not proportional to the number associated with that year.
	
	
	
Pergunta 9
0 em 1 pontos
	
	
	
	Questions 1-3 are related to the following information:
A college professor records the following information for each of the 55 students enrolled in her class:
• Gender
• Year (Freshman, Sophomore, Junior, Senior)
• Number of missed classes
• Midterm score
• Extra credit (1 – Submitted, 2 – Not submitted)
• Final exam score
Skills: Understand the structure of a data set and identify different type of variables. Identify subjects and variables
"multiple choice" question: select the correct answer. 
What are the individuals in this dataset?
	
	
	
	
		Resposta Selecionada:
	 
The six pieces of information recorded on each student
	Resposta Correta:
	 
The 55 students enrolled in the professor’s class
	
	
	
Pergunta 10
0 em 1 pontos
	
	
	
	Skills: 
Identify direction
Identify subjects and variables
Assess strengthIdentify form
"Fill in the blank" question: select the correct answer. This is a scatter plot showing the amount of sleep needed per day by age. What type of relationship is represented between age and hours of sleep needed? The direction of this relationship is . In the context of this example, this means that as we age we tend to need sleep. The form of the relationship tends to be and
	
	
	
	
		Resposta Selecionada:
	 
positive
	Resposta Correta:
	 
negative